data link layer is the protocol layer in a program that handles the moving of data into and out of a physical link in a network.

data link layer is the protocol layer in a program that handles the moving of data into and out of a physical link in a network.

• 1.
  S.Kavitha Head & AssiatantProfessor Department of Computer Science Sri Sarada Niketan College of Science for Women,Karur. Computer Network
• 2.
  Data Link Layer The data link layer is the protocol layer in a program that handles the moving of data into and out of a physical link in a network.  The data link layer is Layer 2 in the Open Systems Interconnection (OSI) architecture model for a set of telecommunication protocols. Unit - II
• 4.
  Error detection andCorrection  Error detection − Error detection involves checking whether any error has occurred or not. The number of error bits and the type of error does not matter.  Error correction − Error correction involves ascertaining the exact number of bits that has been corrupted and the location of the corrupted bits.
• 5.
  Cyclic Codes  ACyclic Code is a block code, where the circular shifts of each codeword gives another word that belongs to the code.  They are error-correcting codes that have algebraic properties that are convenient for efficient error detection and correction.
• 7.
  Forward Error Correction ForwardError Correction (FEC) or channel coding is a technique used for controlling errors in data transmission over unreliable or noisy communication channels.
• 9.
  Data Link controls A data link control is a service that ensures reliable network data communication by managing frame error detection and flow control.  DLC is based on the Data Link layer of the OSI model.
• 11.
   Data LinkControl protocol A communication protocol that converts noisy (error-prone) data links into communication channels free of transmission errors.  Data is broken into frames, each of which is protected by checksum. Data Link Control protocol